CN102374204A - Magnetorheological pilot-operated overflow valve - Google Patents

Magnetorheological pilot-operated overflow valve Download PDF

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Publication number
CN102374204A
CN102374204A CN2011103180623A CN201110318062A CN102374204A CN 102374204 A CN102374204 A CN 102374204A CN 2011103180623 A CN2011103180623 A CN 2011103180623A CN 201110318062 A CN201110318062 A CN 201110318062A CN 102374204 A CN102374204 A CN 102374204A
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CN
China
Prior art keywords
valve
main valve
main
plug
pilot
Prior art date
Application number
CN2011103180623A
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Chinese (zh)
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CN102374204B (en
Inventor
王京涛
吴张永
杨文勇
王娴
吴喜
王庆辉
温成卓
刘云韩
曲金涛
高晓艳
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昆明理工大学
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Priority to CN201110318062.3A priority Critical patent/CN102374204B/en
Publication of CN102374204A publication Critical patent/CN102374204A/en
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Publication of CN102374204B publication Critical patent/CN102374204B/en

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Abstract

The invention provides a magnetorheological pilot-operated overflow valve belonging to the technical field of hydraulic drive. The magnetorheological pilot-operated overflow valve comprises an end cover, an end cover seal ring, a magnetorheological valve housing, a coil, an iron core, a valve core, a pilot-operated valve body, a pilot-operated seal ring, a damp piece, a main valve housing seal ring, a spring, a guide rod seal ring, a guide rod, a main valve housing, a main valve core, a main valve seat insert, a main valve seat, a main valve body and a damper. The main valve core is in a parabolic ball shape, and the half cone angle of the valve core is larger than that of the valve seat, thus, the pressure difference between an inlet and an outlet of a cone valve can be effectively reduced; the minimum negative pressure moves backwards along a liquid flow direction, appears at the back of the valve core and is avoided appearing in the valve seat, thus, the possibility of gas etching is reduced, noise is reduced, key parts of the valve core and the valve seat are protected, and the service life of the magnetorheological pilot-operated overflow valve is prolonged.

Description

A kind of magnetorheological pilot operated compound relief valve
Technical field
The present invention relates to a kind of magnetorheological pilot operated compound relief valve, belong to hydraulic transmission technology field.
Background technique
Magnetic flow liquid is a kind of functional fluid, not only has the flowability of fluid but also have the plasticity of solid, can realize in the short time changing between solid-liquid two mutually at the utmost point.Make the rheological propertiess such as viscosity, elasticity of magnetic flow liquid take place to change rapidly through the size of regulating externally-applied magnetic field intensity; This transformation is reversible; And viscosity can realize stepless variation with the variation of magnetic intensity; And can change magnetic intensity, thereby realize control to its mechanical property through the size of regulating impressed current.According to the magnetic rheological valve of the rheological properties of magnetic flow liquid design, can realize intelligent control to pressure and flow.At present, existing magnetic rheological valve all is the direct-acting type valve, and the damping force of its generation is less, can only be used for the hydraulic system of low pressure small flow as relief valve.Therefore,, design a kind of magnetorheological pilot operated compound relief valve, satisfy the needs of high-pressure high flux hydraulic power system guide's controlled stage of magnetic rheological valve as relief valve.
Summary of the invention
The purpose of this invention is to provide a kind of magnetorheological pilot operated compound relief valve, be used for high-pressure high flux hydraulic power system, realize continuous, stepless, the intelligent control of valve pressure and flow.
Technological scheme of the present invention is: a kind of magnetorheological pilot operated compound relief valve, form main valve by guide's valve body 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21.The main valve outlet port also is connected with pilot valve.
Said pilot valve comprises end cap 1, magnetic rheological valve housing 3, coil 4, iron core 5, spool 7.Iron core 5 is loaded in the magnetic rheological valve housing 3; Iron core 5 axle center are through-hole structure, are wound with coil 4 on it that spool 7 inserts in the hole of iron cores 5, the formation working clearance 6 between iron core 5 and the spool 7; The width of working clearance 6 is 0.1mm ~ 1.8mm; Length is 6mm ~ 40mm, and the size of working clearance 7 is selected to confirm in given range according to magnetic intensity, magnetic flow liquid character and actual demand.Spool 7 one ends withstand on the main valve internal damping piece 10, and the other end is fixing by end cap 1.
Said main valve comprises guide's valve body 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21.Pilot valve is packed in guide's valve body 8; End cap 1 is fixed on the main valve body 19 with guide's valve body 8, and damping block 10 is packed in the main valve body 19, and main valve housing 15, main valve seat 18 are respectively charged in the main valve body 19; Main valve plug 16 is packed in the main valve housing 15; Guide rod 14 1 ends and main valve plug 16 link together, and the other end is pressed on the main valve seat 18 main valve plug 16 through spring 12, and damper 20 is contained in the main valve body 19.Plug 21 is housed on the main valve body 19.
The maximum service pressure of said magnetorheological pilot operated compound relief valve is 30MPa, and peak rate of flow is 500L/min.
During work, behind the coil electricity in the pilot valve, there is magnetic field in the working clearance between iron core and the spool.The magnetic flow liquid of working clearance of flowing through receives the effect in magnetic field, and its viscosity increases also and produces certain resistance, and the mobile of magnetic flow liquid suffers restraints, and the pressure difference of turnover magnetic rheological valve increases.When the electric current in the coil was increased to certain value, magnetic flow liquid changed semi-solid state into, and the pressure difference of pilot valve also reaches maximum value simultaneously.When system pressure was lower than the pilot valve set pressure, the magnetic flow liquid in the pilot valve was because damping force can't be passed through the working clearance, and cavity pressure equates that with system works pressure main valve plug is closed behind the preceding cavity pressure of pilot valve, the main valve.When system works pressure was higher than the pilot valve set pressure, the magnetic flow liquid internal stress in the pilot valve surpassed semi-solid shearing stress and it is destroyed, and magnetic flow liquid returns to flowing state again and passes through the working clearance.Because the effect of main valve back cavity damper makes before the pilot valve cavity pressure be lower than cavity pressure behind the main valve, the pressure fluid of main valve back cavity flows out to the pilot valve ante-chamber, and the pressure of main valve back cavity is reduced, and this moment, main valve plug received the ambient pressure effect to open overflow.
The invention has the beneficial effects as follows:
(1) working medium is micron order or nano level magnetic flow liquid;
(2) design of the working clearance of magnetic rheological valve improves the magnetic induction intensity of magnetic flow liquid in the working clearance between iron core and spool, increases the damping force of magnetic rheological valve, improves the operating range of magnetorheological pilot valve;
(3) magnetic induction intensity of magnetic flow liquid is to regulate through size of current, can directly realize the control to magnetorheological pilot operated compound relief valve pressure and flow through electrical signal;
(4) main valve plug adopts parabola bulb shape, and the spool semi-cone angle can effectively reduce the pressure reduction that cone valve is imported and exported greater than the valve seat semi-cone angle; Minimum sub-atmospheric pressure moves along the direction of flow backward, appears at the back of spool, avoids the valve seat place minimum sub-atmospheric pressure to occur; Thereby reduce the possibility that cavitation erosion takes place; Reduce noise, the key component of protection spool valve seat, the working life of improving magnetorheological pilot operated compound relief valve;
(5) seal ring adopts carbon graphite material, makes the sealability of this valve significantly improve;
(6) main valve housing adopts metal-graphite material processing, has good anti-corrosion, excellent self-lubricating property, and antifriction, antidetonation, antiwear property are good;
(7) adopt the liquid of three dampers to hinder network in the valve, realized the pressure controlled while, improved the stability of main valve.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Each label is among the figure: 1: end cap, 2: end bracket enclosed circle, 3: magnetic rheological valve housing, 4: coil, 5: iron core, 6: the working clearance; 7: spool, 8: guide's valve body, 9: pilot valve seal ring, 10: damping block, 11: the main valve housing seal ring; 12: spring, 13: guide rod seal ring, 14: guide rod, 15: main valve housing, 16: main valve plug; 17: main valve seat seal ring, 18: main valve seat, 19: main valve body, 20: damper, 21: plug.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described further, but content of the present invention is not limited to said scope.
Implement row 1: as shown in the figure, a kind of magnetorheological pilot operated compound relief valve is formed main valve by guide's valve body 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21.The main valve outlet port also is connected with pilot valve.
Said pilot valve comprises end cap 1, magnetic rheological valve housing 3, coil 4, iron core 5, spool 7.Iron core 5 is loaded in the magnetic rheological valve housing 3, and iron core 5 axle center are through-hole structure, are wound with coil 4 on it, and spool 7 inserts in the hole of iron cores 5, and the formation working clearance 6 between iron core 5 and the spool 7, the width of working clearance 6 is 0.1mm, and length is 6mm.Spool 7 one ends withstand on the main valve internal damping piece 10, and the other end is fixing by end cap 1.
Said main valve comprises guide's valve body 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21.Pilot valve is packed in guide's valve body 8; End cap 1 is fixed on the main valve body 19 with guide's valve body 8, and damping block 10 is packed in the main valve body 19, and main valve housing 15, main valve seat 18 are respectively charged in the main valve body 19; Main valve plug 16 is packed in the main valve housing 15; Guide rod 14 1 ends and main valve plug 16 link together, and the other end is pressed on the main valve seat 18 main valve plug 16 through spring 12, and damper 20 is contained in the main valve body 19.Plug 21 is housed on the main valve body 19.
The maximum service pressure of said magnetorheological pilot operated compound relief valve is 30MPa, and peak rate of flow is 500L/min.
Implement row 2: as shown in the figure, a kind of magnetorheological pilot operated compound relief valve is formed main valve by guide's valve body 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21.The main valve outlet port also is connected with pilot valve.
Said pilot valve comprises end cap 1, magnetic rheological valve housing 3, coil 4, iron core 5, spool 7.Iron core 5 is loaded in the magnetic rheological valve housing 3, and iron core 5 axle center are through-hole structure, are wound with coil 4 on it, and spool 7 inserts in the hole of iron cores 5, and the formation working clearance 6 between iron core 5 and the spool 7, the width of working clearance 6 is 1.8mm, and length is 40mm.Spool 7 one ends withstand on the main valve internal damping piece 10, and the other end is fixing by end cap 1.
Said main valve comprises guide's valve body 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21.Pilot valve is packed in guide's valve body 8; End cap 1 is fixed on the main valve body 19 with guide's valve body 8, and damping block 10 is packed in the main valve body 19, and main valve housing 15, main valve seat 18 are respectively charged in the main valve body 19; Main valve plug 16 is packed in the main valve housing 15; Guide rod 14 1 ends and main valve plug 16 link together, and the other end is pressed on the main valve seat 18 main valve plug 16 through spring 12, and damper 20 is contained in the main valve body 19.Plug 21 is housed on the main valve body 19.
The maximum service pressure of said magnetorheological pilot operated compound relief valve is 30MPa, and peak rate of flow is 500L/min.
Implement row 3: as shown in the figure, a kind of magnetorheological pilot operated compound relief valve is formed main valve by guide's valve body 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21.The main valve outlet port also is connected with pilot valve.
Said pilot valve comprises end cap 1, magnetic rheological valve housing 3, coil 4, iron core 5, spool 7.Iron core 5 is loaded in the magnetic rheological valve housing 3, and iron core 5 axle center are through-hole structure, are wound with coil 4 on it, and spool 7 inserts in the hole of iron cores 5, and the formation working clearance 6 between iron core 5 and the spool 7, the width of working clearance 6 is 0.9mm, and length is 17mm.Spool 7 one ends withstand on the main valve internal damping piece 10, and the other end is fixing by end cap 1.
Said main valve comprises guide's valve body 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21.Pilot valve is packed in guide's valve body 8; End cap 1 is fixed on the main valve body 19 with guide's valve body 8, and damping block 10 is packed in the main valve body 19, and main valve housing 15, main valve seat 18 are respectively charged in the main valve body 19; Main valve plug 16 is packed in the main valve housing 15; Guide rod 14 1 ends and main valve plug 16 link together, and the other end is pressed on the main valve seat 18 main valve plug 16 through spring 12, and damper 20 is contained in the main valve body 19.Plug 21 is housed on the main valve body 19.
The maximum service pressure of said magnetorheological pilot operated compound relief valve is 30MPa, and peak rate of flow is 500L/min.

Claims (7)

1. magnetorheological pilot operated compound relief valve; Form main valve by guide's valve body (8), damping block (10), spring (12), guide rod (14), main valve housing (15), main valve plug (16), main valve seat (18), main valve body (19), damper (20), plug (21), it is characterized in that: the main valve outlet port also is connected with pilot valve.
2. magnetorheological pilot operated compound relief valve according to claim 1; It is characterized in that: pilot valve comprises end cap (1), magnetic rheological valve housing (3), coil (4), iron core (5), spool (7); Iron core (5) is loaded in the magnetic rheological valve housing (3); Iron core (5) axle center is through-hole structure, is wound with coil (4) on it that spool (7) inserts in the hole of iron core (5), forms the working clearance (6) between iron core (5) and the spool (7); Spool (7) one ends withstand on the main valve internal damping piece (10), and the other end is fixing by end cap (1).
3. magnetorheological pilot operated compound relief valve according to claim 1; It is characterized in that: pilot valve is packed in guide's valve body (8); End cap (1) and guide's valve body (8) are fixed on the main valve body (19), and damping block (10) is packed in the main valve body (19), and main valve housing (15), main valve seat (18) are respectively charged in the main valve body (19); Main valve plug (16) is packed in the main valve housing (15); Guide rod (14) one ends and main valve plug (16) link together, and the other end is pressed on the main valve seat (18) main valve plug (16) through spring (12), and damper (20) is contained in the main valve body (19).
4. according to claim 1 or 3 described magnetorheological pilot operated compound relief valves, it is characterized in that: plug (21) is housed on the main valve body (19).
5. magnetorheological pilot operated compound relief valve according to claim 1 and 2 is characterized in that: the working clearance (6) that forms between said spool (7) and the iron core (5) is 0.1mm ~ 1.8mm.
6. according to claim 5 described magnetorheological pilot operated compound relief valves, it is characterized in that: working clearance (6) length that forms between said spool (7) and the iron core (5) is 6mm ~ 40mm.
7. according to claim 1 described magnetorheological pilot operated compound relief valve, it is characterized in that: the maximum service pressure of magnetorheological pilot operated compound relief valve is 30MPa, and peak rate of flow is 500L/min.
CN201110318062.3A 2011-10-19 2011-10-19 A kind of magnetorheological pilot-operated overflow valve CN102374204B (en)

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CN102374204B CN102374204B (en) 2016-05-25

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103062145A (en) * 2013-01-14 2013-04-24 昆明理工大学 Magnetorheological plug-in high-speed switching valve
CN103185043A (en) * 2013-03-12 2013-07-03 合肥工业大学 Intelligent liquid flow control valve
CN104632744A (en) * 2015-02-11 2015-05-20 华侨大学 Magneto-rheological pilot valve
CN104632745A (en) * 2015-02-11 2015-05-20 华侨大学 Sequence valve with magneto-rheological pilot valve
CN105003478A (en) * 2015-06-30 2015-10-28 河南平高电气股份有限公司 Control valve and circuit breaker hydraulic operating mechanism using control valve
CN105221634A (en) * 2015-11-05 2016-01-06 重庆材料研究院有限公司 Based on the damper piston structure of adaptive damping throttle valve
CN106151144A (en) * 2016-08-11 2016-11-23 张广 A kind of check valve based on magnetic rheology effect
CN111306126A (en) * 2020-03-20 2020-06-19 中国矿业大学 Magnetorheological fluid pilot type pressure reducing valve

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5353839A (en) * 1992-11-06 1994-10-11 Byelocorp Scientific, Inc. Magnetorheological valve and devices incorporating magnetorheological elements
CN2697420Y (en) * 2004-04-21 2005-05-04 华中科技大学 Pre-guiding type water pressure overflow valve
KR20050115212A (en) * 2005-11-21 2005-12-07 윤영원 A proportional controlling solenoid valve and its controlling method
CN201461578U (en) * 2009-07-02 2010-05-12 昆明理工大学 Digital pure-water overflow valve
CN201531476U (en) * 2009-10-15 2010-07-21 昆明理工大学 Magnetorheological fluid pilot operated type relief valve
CN202280680U (en) * 2011-10-19 2012-06-20 昆明理工大学 Magnetorheological pilot overflow valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5353839A (en) * 1992-11-06 1994-10-11 Byelocorp Scientific, Inc. Magnetorheological valve and devices incorporating magnetorheological elements
CN2697420Y (en) * 2004-04-21 2005-05-04 华中科技大学 Pre-guiding type water pressure overflow valve
KR20050115212A (en) * 2005-11-21 2005-12-07 윤영원 A proportional controlling solenoid valve and its controlling method
CN201461578U (en) * 2009-07-02 2010-05-12 昆明理工大学 Digital pure-water overflow valve
CN201531476U (en) * 2009-10-15 2010-07-21 昆明理工大学 Magnetorheological fluid pilot operated type relief valve
CN202280680U (en) * 2011-10-19 2012-06-20 昆明理工大学 Magnetorheological pilot overflow valve

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103062145A (en) * 2013-01-14 2013-04-24 昆明理工大学 Magnetorheological plug-in high-speed switching valve
CN103185043A (en) * 2013-03-12 2013-07-03 合肥工业大学 Intelligent liquid flow control valve
CN103185043B (en) * 2013-03-12 2015-11-04 合肥工业大学 Intelligent liquid flow control valve
CN104632744A (en) * 2015-02-11 2015-05-20 华侨大学 Magneto-rheological pilot valve
CN104632745A (en) * 2015-02-11 2015-05-20 华侨大学 Sequence valve with magneto-rheological pilot valve
CN105003478A (en) * 2015-06-30 2015-10-28 河南平高电气股份有限公司 Control valve and circuit breaker hydraulic operating mechanism using control valve
CN105221634A (en) * 2015-11-05 2016-01-06 重庆材料研究院有限公司 Based on the damper piston structure of adaptive damping throttle valve
CN106151144A (en) * 2016-08-11 2016-11-23 张广 A kind of check valve based on magnetic rheology effect
CN111306126A (en) * 2020-03-20 2020-06-19 中国矿业大学 Magnetorheological fluid pilot type pressure reducing valve

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